Operation Manual

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Appendix A: About the AVM ISDN-Controller M1
Appendix A:
About the AVM Mobile ISDN-Controller M1
This chapter provides technical background information
about the AVM Mobile ISDN-Controller M1. In addition
to descriptions of the Controller’s operating modes, it
also contains details about the protocols implemented
and the types of terminal equipment that are compatible
at the remote end.
A.1 The Four Operating Modes
In accordance with the latest CAPI 2.0 specification, the
Mobile ISDN-Controller M1 supports digital and ana-
log data connections and Group 3 telefax connections to
subscribers in ISDN or PSTN. The four operating modes
correspond to the different types of remote equipment
that Mobile ISDN users may dial up.
A.1.1 Mobile ISDN
The implementation of Mobile ISDN is defined in interna-
tional specifications (GSM-API, GSM 07.08). The world’s
first implementation of this user-friendly technique is
realized by the Mobile ISDN-Controller M1 at the GSM
end and the AVM ISDN-Controller B1 or one of the
AVM FRITZ!Cards at the ISDN end. If the AVM ISDN-
Controller B1 is used at the ISDN line called, AVM’s
Mobile ISDN protocol is used, and operation of the
Mobile ISDN-Controller M1 is even simplified further.
All CAPI 2.0 applications then can be used effortlessly
over GSM and ISDN – generally in the same way as over
ISDN alone. For example, a very common application of
this technique is the remote access software NetWAYS/
ISDN which is used by a mobile workstation to dial in to
AVM’s NetWare MultiProtocol Router for ISDN or
ISDN Access Server for Windows NT using the ISDN-
Controller B1 (on a BRI line) or T1 (on a PRI).